False twist spindle



G, MJaouLLloNV FALSE TWIST SPINDLE March 4, 1958 Fuga Aug. 7. 195s IINVENTO'R. G50/ra: /1 Baan/0N United States Patent() FALSE TWIST SPINDLE George M. Boullion,v Greensboro, N. C., assignor to Do- All Metal Products Co., Inc., BronX, .N. Y., a corporation of New York Application August 7, 1956, Serial No. 602,644

3 Claims. (Cl. 57-77.45)

This invention relates to a false twist spindle of the type which is adaptedto produce stretchable nylon yarn.

Among the objects of the invention is to provide a false twist spindle which is adapted to be driven at a very high rotational speed.

Among other objects of the invention is to provide a rugged false twist spindle which is adapted to be easily serviced, lubricated and adjusted.

The objects of the invention are obtained by providing a spindle in two easily separable parts, a rotating or spindle portion and a shell or casing portion. The spindle 'Y portion has two sets of ball bearings means attached thereto with spacing means therebetween which serves to adjustably position the spindle portion in the shell. Each set of ball bearings comprises an inner and an outer race and spacing means for the bearings all of which are retained on the spindle portion. The spacer means extends between the outer races of the two sets of ball bearings.

The shell or casing portion remains stationary and it is by this portion that the twister is attached to the treating machine. The shell in addition provides a backing or support for the outer races of the sets of ball bearings. Means are provided on the shell to cooperate with the spacer means of the spindle to hold the latter in proper position in the shell and to adjust, within certain limits, the position of the spacer means therein and therby to adjust the position of the sets of ball bearings in the shell. By a simple operation the spindle may be released and removed for lubricating, servicing, etc.

In the drawing- Fig. l illustrates, diagrammatically, the way in which a yarn is treated to provide a stretch yarn by the device of the invention.

Fig. 2 is an exploded cross sectional view of the two parts of the spindle.

Fig. 3 is a view, partly in cross section of the assembled device.

As illustrated in Fig. l, yarn which is to be given a false twist to make it stretchable is led from bobbin 10, through a tensioning means 11, and a heating device 12 to the false twister of the invention. The false twister 20 is attached to a support 13 which may be a swing gate, for example. The shoulder 27 of the shell has a rubber gasket 28 tted thereon and nuts 22 and 24 are removed whereupon the spindle may be slipped into the opening provided for it on the swing gate. The spindle is secured on the swing gate 13 by nut 24 with gasket 29 between said nut 24 and swing gate. The exposed portion of spindle 30 is driven by a belt 14. Heated yarn from device 12 passes through the bore of spindle 30, once or twice around the roller 40 and to a take-up device (not shown). The spindle of this invention is capable of being driven at speeds of 30,000 to 60,000 or more R. l. M. In the false twisting process a twist is applied to the yarn while the latter is heated and this twist is removed as the yarn leaves roller 40.

As illustrated in Figs. 2 and 3, the shell portion 21 is vthreaded-at thelower end .23 and conta-ins the lock nut y24 and the closure capr 2 2. The device is attached to the de ksited. support `such asavv swing gate by adjusting and tightening the nut24. The .inside ofl the 4sleeve 21 con- .tains ank inwardly-.projecting stop ring 26 against which a shoulder 31v of vtheouter race v43 `of the lower set lofball ,bearings 32 is adapted tol rest. .In the central portion of sleeve 21 below shoulder27 two or morevadjusting .set

screws 25y (only Yone-shown) are provided to fix the position of the spacer and the stem in the shell. The closure cap 22 has two functions. It includes the ared guide opening 38 which enables one to thread the device. In threading a needle (threaded with an end of the yarn to be treated) is passed upwardly through the bore 34 of the spindle. The ared guide opening 38 automatically guides the needles into the bore. The bore also contains an annular well or depression 39 adapted to catch any drippings of oil, for example, which may be thrown otf by the bearings and prevent these drippings from contaminating the yarn.

The spindle portion 30 comprises the tubular stem portion 33 having the smooth inner bore 34. To the rotating stem 33 there are attached, to rotate therewith, the slinger 35, the inner races 41 and 42 of bearings of bearing sets 32 and 37, and the stop ring 36 which xes the position of the lower set of ball bearings 32 on the spindle tube 33. v

The ball bearing sets, per se, are not new and since the sets are similar only the lower set 32 will be described. This set comprises the inner race 41, the outer race 43 between which the balls 44 are adapted to rotate. The balls 44 are maintained in properly spaced position by a ring 45 which may be made of nylon. Shield means 46, 47 may be attached to the stationary outer race 43 and lubricant retaining stuing material may till the space between nylon ring 45 and shields 46, 47.

The sets of ball bearings 32 and 37 are held quite securely on stem 30 but are additionally maintained in properly spaced position by spacer ring 50, which bears against the inner edges of the outer races 43 and 48. This ring has a centrally located annular slot 51 against which set screw 25 of sleeve 21 is adapted to press to hold and adjust the stem means 30 in the shell 21.

The upper part of the stem 33 contains the roller 40 mounted by means of a pin 52 for rotating in said stem 33. A very satisfactory roller is one made of plastic material which is light in weight such as nylon.

As stated above, the construction provides for rapid rotation of the spindle within the shell 21. The stem portion 33 is easily lremoved from the shell 20 and in removing no disassembly of critical parts occurs. By drilling two holes in the swing gate 13 permitting access to the set screws 25, a spindle portion can be replaced or substituted without removing shell 20 from said swing gate 13 (Fig. l), for example. The twin sets of. ball bearings provide a rugged construction which cannot become askew and which is capable of being driven at very high rotational speeds.

The features and principles underlying the invention described above in connection with specic exemplications will suggest to those skilled in the art many other modifications thereof. It is accordingly desired that the appended claims shall not be limitedpto any specific feature or details thereof.

I claim:

l. In a false twister spindle device, an outer shell adapted to be held in stationary position and an inner rotating stem means, said stem means having a slinger means intermediate the ends thereof, the portion of said stem below said slinger fitting into said outer shell, a bore extending through said stem, a roller mounted with its axis extending at right angles to the axis of the bore adjacent the top end of said stem, the portion of said stem below the slinger containing two sets of ball bearing means which includes an inner race and an outer race, the said inner races of saidsets of bali bearings closely fitting about said stern, spacer :means extending `between the outer races of said sets of ball bearings,` means on the shell to adjust the position of said spacer means with respect to the shell and to thereby adjustably hold the stem means in said shell whereby on the release of said last named means the entire rotating stem with the ball bearing means may be removed from said shell.

2. In a false twister spindle device as claimed in claim 1, cap means surrounding the lower end of the shell, said cap means having a smoothly flared opening adapted to guide a needle into the bore ot' said stern.

3. In a false twister spindle device as claimed in claim 2, wherein said cap means includes an annular depression in the inside portion facing said stem means whereby said depression catches oil thrown off by said bearings.

References Cited in the file of this patent UNITED STATES PATENTS 2,588,459 Annen Mar. 11, 1952 

